removeListener method
Implementation
bool removeListener(StreamxxListener_c? item) {
if (null == item) {
return false;
}
for (int i = 0; i < _listeners.length; ++i) {
final nowId = _listeners[i].id;
if (nowId == item.id) {
_listeners.removeAt(i);
return true;
} else if (nowId > item.id) {
return false;
}
}
return false;
}